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Finding the Fourth Proportional to 123,048.80, 169,814.40 and 75,288.80

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Solution

The fourth proportional to 123,048.80, 169,814.40 and 75,288.80 is: 103,902.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,048.80 : 169,814.40 = 75,288.80 : x
  2. Step 2: Convert to fraction form
    123,048.80/169,814.40 = 75,288.80/x
  3. Step 3: Cross multiply
    123,048.80x = 169,814.40 × 75,288.80
  4. Step 4: Simplify right side
    123,048.80x = 12,785,122,398.72
  5. Step 5: Solve for x
    x = 12,785,122,398.72/123,048.80
  6. Step 6: Final answer
    x = 103,902.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.